As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: R3 DOOR, EMERGENCY POWER SUPPLY UNIT 12WL BATTERY FAILED EMERGENCY LIGHTING SYSTEM TEST PER TASK CARD 26L00025010. MAINTENANCE REPLACED THE BATTERY AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 25-61-00 AND TASK CARD 26L00025010 WITH NO DEFECTS NOTED.